Erratum to “Biomarkers in surface sediments from the Cross River and estuary system, SE Nigeria: Assessment of organic matter sources of natural and anthropogenic origins” [Appl. Geochem. 31 (2013) 239–250]

0883-2927/$ see front matter 2013 Elsevier Ltd. All rights reserved. http://dx.doi.org/10.1016/j.apgeochem.2013.04.011 DOI of original article: http://dx.doi.org/10.1016/j.apgeochem.2013.01.010 ⇑ Corresponding author. Present address: Department of Physical and Environmental Sciences, University of Toronto at Scarborough, 1265 Military Trail SY315, Ontario, Canada M1C 1A4. Tel.: +1 416 287 7236; fax: +1 416 287 7279. E-mail address: oliva.pisani@utoronto.ca (O. Pisani). Oliva Pisani a,⇑, Daniel R. Oros , Orok E. Oyo-Ita , Bassey O. Ekpo , Rudolf Jaffe , Bernd R.T. Simoneit d a Southeast Environmental Research Center, and Department of Chemistry and Biochemistry, Florida International University, Miami, FL 33199, USA 72 Marina Lakes Drive, Richmond, CA 94804, USA Department of Pure and Applied Chemistry, University of Calabar, Calabar, Cross River State, Nigeria Department of Chemistry, Oregon State University, Corvallis, OR 97331, USA